Critical Whenever I try to update plugins using the Jenkins-UI or even downloading them with Firefox I get a 404-error.
I found the following discussions relating this kind of problem to a proxy:
http://jenkins.361315.n4.nabble.com/Jenkins-site-down-td4504875.html
http://jenkins.361315.n4.nabble.com/Jenkins-download-page-seems-to-be-down-td3520292.html
Unfortunately, these discussion don't point to a reliable solution. Not using the proxy is not an option in our company.
Error-Message:
hudson.util.IOException2: Failed to download from http://updates.jenkins-ci.org/download/plugins/artifactory/2.0.7/artifactory.hpi at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:659) at hudson.model.UpdateCenter$DownloadJob._run(UpdateCenter.java:978) at hudson.model.UpdateCenter$InstallationJob._run(UpdateCenter.java:1121) at hudson.model.UpdateCenter$DownloadJob.run(UpdateCenter.java:957) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: java.io.FileNotFoundException: http://updates.jenkins-ci.org/download/plugins/artifactory/2.0.7/artifactory.hpi at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1496) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1490) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1144) at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:629) ... 9 more Caused by: java.io.FileNotFoundException: http://updates.jenkins-ci.org/download/plugins/artifactory/2.0.7/artifactory.hpi at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439) at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:2301) at java.net.URLConnection.getHeaderFieldInt(URLConnection.java:579) at java.net.URLConnection.getContentLength(URLConnection.java:474) at hudson.model.UpdateCenter$UpdateCenterConfiguration.download(UpdateCenter.java:628) ... 9 more
